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A Method for Broadband Full-Duplex MIMO Radio

  • Author(s): Hua, Yingbo
  • Liang, Ping
  • Ma, Yiming
  • Cirik, Ali C
  • Gao, Qian
  • et al.
Abstract

We present a time-domain transmit beamforming (TDTB) method for self-interference cancelation (SIC) at the radio frequency (RF) frontend of the receivers on broadband full-duplex MIMO radios. It is shown that the conventional frequency-domain transmit beamforming (FDTB) method along with the orthogonal frequency division multiplexing (OFDM) framework does not generally perform SIC in the prefix region of a transmitted frame. A hardware based test of the TDTB method shows a 50 dB SIC over a bandwidth of 30 MHz.

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